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Modified instanton sum in QCD and higher-groups

Journal Article · · Journal of High Energy Physics (Online)
We consider the SU(N) Yang-Mills theory, whose topological sectors are restricted to the instanton number with integer multiples of p. We can formulate such a quantum field theory maintaining locality and unitarity, and the model contains both 2π-periodic scalar and 3-form gauge fields. This can be interpreted as coupling a topological theory to Yang-Mills theory, so the local dynamics becomes identical with that of pure Yang-Mills theory. The theory has not only $$\mathbb{Z}$$N 1-form symmetry but also $$\mathbb{Z}$$p 3-form symmetry, and we study the global nature of this theory from the recent ’t Hooft anomaly matching. The computation of ’t Hooft anomaly incorporates an intriguing higher-group structure. We also carefully examine that how such kinematical constraint is realized in the dynamics by using the large-N and also the reliable semiclassics on $$\mathbb{R}$$3 × S1, and we find that the topological susceptibility plays a role of the order parameter for the $$\mathbb{Z}$$p 3-form symmetry. Introducing a fermion in the fundamental or adjoint representation, we find that the chiral symmetry becomes larger than the usual case by $$\mathbb{Z}$$p, and it leads to the extra p vacua by discrete chiral symmetry breaking. No dynamical domain wall can interpolate those extra vacua since such objects must be charged under the 3-form symmetry in order to match the ’t Hooft anomaly.
Research Organization:
North Carolina State Univ., Raleigh, NC (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
FG02-03ER41260
OSTI ID:
1777084
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 3 Vol. 2020; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (8)

Higher-form symmetries and 3-group in axion electrodynamics journal September 2020
Finite-density massless two-color QCD at the isospin Roberge-Weiss point and the 't Hooft anomaly journal August 2020
Anomalies, a mod 2 index, and dynamics of 2d adjoint QCD journal January 2020
Universality between vector-like and chiral quiver gauge theories: Anomalies and domain walls text January 2020
Strongly coupled QFT dynamics via TQFT coupling text January 2020
Discrete Theta Angles, Symmetries and Anomalies text January 2020
Topological violation of global symmetries in quantum gravity text January 2020
Lifetimes of (near) eternal false vacua text January 2020

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